fからkへの変換 (°F → K)

1 °F = 255.927778K. 測定カテゴリ間をスムーズに切り替え、リアルタイムで全単位マトリックスを計算し、瞬時に結果をコピーできます。

⇄

温度 Converter

Decimals:

From

Formula: --

⚡ All Temperature Scales

Real-time simultaneous conversions across standard thermodynamic and regional scales.

Auto-synchronized

Celsius

Metric standard (Water freezes at 0°, boils at 100°)

°C

-- °C

Fahrenheit

US customary scale (Water freezes at 32°, boils at 212°)

°F

-- °F

Kelvin

SI thermodynamic absolute zero reference

-- K

Rankine

Absolute thermodynamic scale using Fahrenheit increments

°R

-- °R

Réaumur

Historical scale (Water freezes at 0°, boils at 80°)

°Ré

-- °Ré

∑

Step-by-Step Mathematical Derivation

Verified SI Standard

➡️ Convert f to k

Value in K = Value in °F × 0.5555556

To convert any quantity from f to k, multiply the quantity by the constant conversion factor 0.5555556.

⬅️ Convert k to f (Inverse)

Value in °F = Value in K × 1.8

To reverse the operation, multiply your k figure by 1.8 (or divide by 0.5555556).

🔢 Step-by-Step Calculation Procedure:

Identify the starting value in f (°F).
Apply the exact linear conversion factor: 1 °F = 0.5555556 K.
Multiply the input value by 0.5555556 to obtain the exact measurement in k (K).
Verify precision against standard BIPM / NIST SP 811 statutory guidelines.

⚡

All-Units Instant Matrix

Live Computed

c --

°C

f --

°F

k --

r --

°R

reaumur --

°Ré

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Printable Reference Cheat Sheet

Generate clean offline reference PDF tables for Temperature

Temperature Reference Sheet

Standard SI Base Unit: 1 c

aiunitconverters.com

10/14/2026

Unit Name	Symbol	System	Equivalent in c
Celsius	°C	Standard	1 °C = 1 c
Fahrenheit	°F	Standard	1 °F = 0.5555555555555556 c
Kelvin	K	Standard	1 K = 1 c
Rankine	°R	Standard	1 °R = 0.5555555555555556 c
Réaumur	°Ré	Standard	1 °Ré = 1.25 c

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Academic & Research Citation Exporter

Cite this mathematical formula and conversion factor in research papers and wikis

BibTeX / APA / IEEE

@misc{ai_unit_converter_f_to_k,
  author       = {AI Unit Converters Standards Board},
  title        = {Exact f to k Conversion Factor and Mathematical Derivation},
  year         = {2026},
  howpublished = {\url{https://aiunitconverters.com/ja/temperature/f-to-k}},
  note         = {Derived from NIST Special Publication 811 and BIPM SI Brochure}
}

AI Unit Converters. (2026). f to k conversion formula & metric standard. Retrieved from https://aiunitconverters.com/ja/temperature/f-to-k

[1] AI Unit Converters Standards Board, "f to k conversion factor," 2026. [Online]. Available: https://aiunitconverters.com/ja/temperature/f-to-k. [Accessed: Oct 14, 2026].

\[ 1\text{ f} = \text{factor} \times 1\text{ k} \]

📊基準換算表

f (°F)k (K)

-40°F	233.15K
-20°F	244.2611K
0°F	255.3722K
10°F	260.9278K
20°F	266.4833K
25°F	269.2611K
30°F	272.0389K
37°F	275.9278K
50°F	283.15K
75°F	297.0389K
100°F	310.9278K
150°F	338.7056K
200°F	366.4833K
250°F	394.2611K
300°F	422.0389K
500°F	533.15K

k (K)f (°F)

-40K	-531.67°F
-20K	-495.67°F
0K	-459.67°F
10K	-441.67°F
20K	-423.67°F
25K	-414.67°F
30K	-405.67°F
37K	-393.07°F
50K	-369.67°F
75K	-324.67°F
100K	-279.67°F
150K	-189.67°F
200K	-99.67°F
250K	-9.67°F
300K	80.33°F
500K	440.33°F